CN102155163B - Deepwater multifunctional water pump drilling system and installation method thereof - Google Patents

Deepwater multifunctional water pump drilling system and installation method thereof Download PDF

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Publication number
CN102155163B
CN102155163B CN 201110052483 CN201110052483A CN102155163B CN 102155163 B CN102155163 B CN 102155163B CN 201110052483 CN201110052483 CN 201110052483 CN 201110052483 A CN201110052483 A CN 201110052483A CN 102155163 B CN102155163 B CN 102155163B
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connects
water
pump
shell
marine riser
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CN102155163A (en
Inventor
殷志明
陈国明
徐群
周建良
蒋世全
许亮斌
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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Institute of Chemistry of CAS
China University of Petroleum UPC East China
China National Offshore Oil Corp CNOOC
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Abstract

The invention relates to a deepwater multifunctional water pump drilling system and an installation method thereof. The deepwater multifunctional water pump drilling system is characterized by comprising a lifting mechanism and a control center which are arranged on a drilling platform; the lifting mechanism is connected with a water pump group through a cable; the water pump group is connected with a control pipeline, an injection/backflow pipeline and a plurality of flexible pipelines respectively; the other end of the control pipeline is connected with the control center; the other end of the injection/backflow pipeline is connected with a slurry pool arranged on the drilling platform; the other end of each of the flexible pipelines is connected with a rotary distributary injection device; the top of the rotary distributary injection device is connected with an upper marine riser arranged on the drilling platform, and the bottom end of the rotary distributary injection device is connected with a lower marine riser or a seabed blowout preventer; and the seabed blowout preventer is arranged at a seabed well head. The water pump group in the deepwater multifunctional water pump drilling system can be snorkeling in seawater or arranged in the seabed, so various drilling functions such as dual gradient drilling, controllable slurry cap drilling, marine riser dilution dual density drilling and the like can be realized.

Description

Pump drill well system and mounting method thereof in a kind of deep water multifunctional water
Technical field
The present invention relates to a kind of offshore drilling system and mounting method thereof, particularly about pump drill well system and mounting method thereof in a kind of deep water multifunctional water.
Background technology
Current, what offshore drilling was used mainly is conventional single gradient well drilling technology.Conventional single gradient well drilling technology has only a fluid column gradient in well, namely bottom pressure is to be produced by the drilling fluid column pressure of sea to the shaft bottom, and drilling fluid column pressure gradient all is reference point with the sea.In deepwater drilling, because loose deposit and the influence of seawater post in seabed, the gap between strata pressure and the fracture pressure is very little, makes drilling well very difficult.Double-gradient well drilling (the Dual-Gradient Drilling of the external development nineties in last century, DGD), controlled mud cap drilling well (Controlled Mud Cap Drilling, CMCD), (Dual-Density Drilling, DDD) etc. various control pressure drilling technology has solved this problem to the drilling well of marine riser dilution dual density well.
When adopting the double-gradient well drilling technology, seabed above marine riser inner fluid density is close with density of sea water, and the calculation of pressure of drilling well fluid column is reference point with the seabed, and the zone just broadens relatively between formation pore pressure and the fracture pressure.Well kick, blowout and leakage accident significantly reduce, no longer need the multilayer sleeve system, save setting of casing time and well cementation time, shorten well construction period, reduce drilling time and reduce time and the cost of handling drilling failure, reduce the requirement to drilling equipments such as offshore boring island and rigs greatly.Simultaneously, this technology of what is more important can be carried out geologic objective probing in any depth of water, directly is drilled into destination layer as the drill bit of available Φ 311mm, and such borehole size can adopt more effective completion method, as horizontal well and Duo Zhi well technology; Also the oil pipe of available Φ 178mm is exploited, and finally obtains the oil-gas reservoir of high yield.Carried out the seabed mud lifting drilling well of a plurality of double-gradient well drilling systematic researches and application: Conoco leader's industrial combination project team research abroad at present, the DeepVision double-gradient well drilling system of U.S. Baker Hughes and the research of Transocean company, the sub-sea pumping system of Shell, the tiny balloon double-gradient well drilling system of Maurer company, the no marine riser drilling fluid recovery system of AGR Subsea company, the marine riser gaslift of Louisiana State University's research, dilution double-gradient well drilling system etc.Wherein seabed mud lifting well system carries out field trial in the Gulf of Mexico at the bottom of calendar year 2001, and succeeds, and has begun to drop into commercial Application at present, has favorable industrial application prospect.
The liquid level that the drilling well of controlled mud cap is regulated the mud cap by a slush pump comes better control well bottom pressure, CMCD system marine riser is single to link to each other with mud lifting pump by high pressure valve, pumping system links to each other with mud pit with the grouting liquid feed-line by reflux pipeline, pump can increase or reduce the volume of mud in the marine riser, regulate the liquid level of mud in the marine riser, realize bottom pressure control.
The drilling well of marine riser dilution dual density is to inject low density flow in marine riser, reduce the density of Returning fluid in the marine riser annular space, make it suitable with seawater, in whole drilling fluid return loop, keep the dual density drilling fluid system, effective control well eye thimble pneumatics power, bottom pressure, overcome the problem that runs in the deepwater drilling, realize safety, drilling well economically.
But above-mentioned controlled pressure boring method, after subsea pump was lowered under water below 1500 meters, pumping system can run into and much be difficult to the problem that overcomes, such as: the integrity problem of pumping system is difficult to be guaranteed; It is long that each controls response time of pipeline; Transfer, reclaim the overlong time of subsea pump when breaking down.
Summary of the invention
At the problems referred to above, it is wide to the purpose of this invention is to provide a kind of suitable depth of water scope, the reliability height, and it is short that each controls the pipeline response time, pump drill well system and mounting method thereof in the deep water multifunctional water of convenient recovery subsea pump.
For achieving the above object, the present invention takes following technical scheme: pump drill well system in a kind of deep water multifunctional water is characterized in that: it comprises hoisting mechanism and the control centre that is arranged on the offshore boring island; Described hoisting mechanism connects a floating drum by hawser, be provided with pump group in the water of being formed by the seabed slush pump in the described floating drum, the pump group connects the control pipeline respectively in the described water, injection/reflux pipeline and some flexible lines, the other end of described control pipeline connects described control centre, the other end of described injection/reflux pipeline connects the mud pit that is arranged on the described offshore boring island, the other end of each described flexible line connects a rotation shunting injection device, the top of described rotation shunting injection device connects goes up marine riser, the described other end of going up marine riser is arranged on the offshore boring island, the bottom of described rotation shunting injection device connects subsea blow out preventer, and described subsea blow out preventer is arranged on the subsea wellheads place; The drilling rod that arranges on the described offshore boring island passes described going up at the bottom of marine riser, rotation shunting injection device and the subsea blow out preventer lower going-into-well successively, and the described drilling rod that is positioned at the shaft bottom is outside equipped with sleeve pipe, and described sleeve pipe is outside equipped with conduit.
Be provided with down marine riser between described rotation shunting injection device and the described subsea blow out preventer, described drilling rod passes described going up at the bottom of marine riser, rotation shunting injection device, following marine riser and the subsea blow out preventer lower going-into-well successively.
Described rotation shunting injection device comprise one with described on the top sub that is connected of marine riser, described top sub is provided with lateral channel, described lateral channel connects pump group in the described water by a described flexible line wherein; Described top sub bottom connects a shell body, be provided with a rotation assembly in the described shell body, described shell body is provided with the hydraulic locking mechanism for the described rotation assembly of locking, described hydraulic locking mechanism connects hydraulic system, the described shell body that is positioned at described hydraulic locking mechanism below is provided with lateral channel, this described lateral channel connects pump group in the described water by a described flexible line wherein, and described shell body bottom connects one of them in described subsea blow out preventer and the described marine riser down.
Described rotation assembly is symmetrical structure, and it comprises an inner barrel, and the top of described inner barrel is connected a packing unit by a glue core syndeton respectively with the bottom; Described inner barrel is arranged in the outer cylinder body by the swivel bearing system, and described outer cylinder body outer wall is symmetrically arranged with the locking slot corresponding with two described hydraulic locking mechanisms, is provided with static seal structure between described outer cylinder body and the described shell body.
Described swivel bearing system comprises bearing, bearing chamber and bearing seal system, and described bearing chamber connects the lubricating fluid injection device.
The described top sub of described rotation shunting injection device is connected by flange with the described marine riser of going up, described top sub bottom is connected by flange with described shell body, and one of them is connected described shell body bottom and described subsea blow out preventer and described marine riser down by flange.
The lateral channel that arranges on the described top sub, the hydraulic locking mechanism that arranges on the described shell body and lateral channel are two.
The mounting method of pump drill well system in a kind of above-mentioned deep water multifunctional water, it may further comprise the steps: the top sub top that 1) will rotate the shunting injection device connects by flange goes up marine riser, the bottom of top sub connects shell body by flange, hydraulic locking mechanism is arranged on the shell body, the shell body bottom connects subsea blow out preventer by flange, and subsea blow out preventer is arranged on the subsea wellheads; 2) pump group in the water is lowered to the seabed by hoisting mechanism, the seabed underwater robot connects pump group in the water with the lateral channel of top sub by flexible line, with pump group in the water connect to inject reflux pipeline, the lateral channel of shell body is connected the entrance of pump group in the water by flexible line; 3) will rotate assembly and put into shell body by drilling rod, and utilize hydraulic locking mechanism that it is locked.
The mounting method of pump drill well system in a kind of above-mentioned deep water multifunctional water, it may further comprise the steps: the top sub top that 1) will rotate the shunting injection device connects by flange goes up marine riser, the bottom of top sub connects shell body by flange, hydraulic locking mechanism is arranged on the shell body, the shell body bottom connects marine riser down by flange, the bottom of following marine riser connects subsea blow out preventer, and subsea blow out preventer is arranged on the subsea wellheads; 2) pump group in the water is lowered under water by hoisting mechanism, the predetermined altitude identical with rotation shunting injection device, and the adjusting float buoyancy makes, and the pump group is latent in the water floats; 3) the seabed underwater robot connects pump group in the water with the lateral channel of top sub by flexible line, with pump group in the water connect inject reflux pipeline, the lateral channel of shell body is connected the entrance of pump group in the water by flexible line; 4) will rotate assembly and put into shell body by drilling rod, and utilize hydraulic locking mechanism that it is locked.
The present invention is owing to take above technical scheme; it has the following advantages: 1, the present invention since in the water that will be formed by mud lifting pump the pump group be installed in the floating drum; under the control system effect; the pump group can be arranged on the seabed by floating drum in the water; also can dive and float in the seawater; therefore; it is wide to have suitable depth of water scope; it is short that each controls the pipeline response time; seabed mud lifting blowback debit just waits advantage; solved the problem of conventional subsea pump drilling well depth of water scarce capacity, and floating drum can protect mud lifting pump effectively, reduce well system in the chance failure in seabed.2, the present invention is by arranging pump group in the cover water, mud under water can be given rise to platform, also the fluid of platform can be injected in the marine riser, therefore, can realize various control pressure drilling well functions such as double-gradient well drilling, the drilling well of controlled mud cap, the drilling well of marine riser dilution dual density, and can realize different functions at different geological environments and job requirements.3, the present invention connects the floating drum that is built-in with pump group in the water by the lifting mechanism that is arranged on the offshore boring island, utilizes outboard work, therefore, does not take uphole time, can easily well system of the present invention be converted to the conventional drilling system in addition.Structure of the present invention arranges ingenious, and is easy to operate, can realize various control pressure drilling well functions such as double-gradient well drilling, the drilling well of controlled mud cap, the drilling well of marine riser dilution dual density, therefore, can be widely used in the offshore drilling process.
Description of drawings
Fig. 1 is structural representation of the present invention
Fig. 2 is that the present invention rotates shunting injection device structural representation
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, the present invention includes the offshore boring island 1 that is arranged on the sea, offshore boring island 1 is provided with hoisting mechanism 2 and control centre 3, and hoisting mechanism 2 connects a floating drum by hawser 4, is provided with pump group 5 in the water of being made up of mud lifting pump in the floating drum.The drilling well moon pool of offshore boring island 1 is provided with marine riser 6, last marine riser 6 bottoms connect rotation shunting injection device 7, the bottom of rotation shunting injection device 7 connects marine riser 8 down, the bottom of following marine riser 8 connects subsea blow out preventer 9, subsea blow out preventer 9 is arranged on subsea wellheads 10 places, the bottom of subsea blow out preventer 9 is connected with sleeve pipe 11, the sleeve pipe 11 outer conduits 12 that circumferentially are provided with.The drilling rod 13 of transferring from offshore boring island 1 leads to the shaft bottom by last marine riser 6, rotation shunting injection device 7, following marine riser 8 and subsea blow out preventer 9 successively.
Also be provided with control pipeline 14 and the injection/reflux pipeline 15 transferred under water on the offshore boring island 1.Control pipeline 14 1 ends connect control centre 3, and the other end connects pump group 5 in the water.One end of injection/reflux pipeline 15 connects the mud pit that is arranged on the offshore boring island 1 by control valve, and the other end connects pump group 5 in the water.Pump group 5 connects rotation shunting injection device 7 by some flexible lines 16 in the water.
As shown in Figure 2, rotation shunting injection device 7 comprises a top sub 71, one shell bodies 72, one rotation assembly 73 and two hydraulic locking mechanisms 74.
The upper flange 711 of top sub 71 connects goes up marine riser 6, and the lower flange 712 of top sub 71 connects the upper flange 721 of shell body 72, and the lower flange 722 of shell body 72 connects marine riser 8 down.Top sub 71 circumferentially is provided with lateral channel 713, and lateral channel 713 connects pump group 5 in the water by flexible line 16.Shell body 72 circumferentially can be provided with two lateral channels 723,724, and one of them connects pump group 5 in the water by flexible line 16, and another can be standby.
Rotation assembly 73 is arranged in the shell body 72, two hydraulic locking mechanisms 74 are symmetricly set on the shell body 72 of two side direction runners 723,724 tops, and be fixed on the shell body 72 by mechanical type draw bail 75, hydraulic locking mechanism 74 connects hydraulic system, by the control realization locking rotation assembly 73 of hydraulic system.
Rotation assembly 73 is symmetrical structure up and down, it comprises an inner barrel 731, inner barrel 731 tops are connected a packing unit 733 by a glue core syndeton 732 respectively with the bottom, and upper and lower two packing units 733 are used for holding tightly the drilling rod 13 that is located in the rotation assembly 73.Inner barrel 731 is arranged in the outer cylinder body 735 by swivel bearing system 734, and swivel bearing system 734 comprises bearing, bearing chamber 736 and bearing seal system 737, bearing chamber 736 connects the lubricating fluid injection device, in the bearing chamber 736 between inner barrel 731 and the outer cylinder body 735, inject lubricating grease by the lubricating fluid injection device, and by 737 sealings of bearing seal system, lubricating grease is used for lubricating bearings and rotary dynamic seal spare etc.Outer cylinder body 735 outer walls are symmetrically arranged with the locking slot 738 corresponding with two hydraulic locking mechanisms 74, are provided with static seal structure 739 between outer cylinder body 735 and the shell body 72.
In above-described embodiment, the bottom of rotation shunting injection device 7 also can directly connect subsea blow out preventer 9.
In above-described embodiment, the bearing in the swivel bearing system 734 can adopt two taper roll bearings.
In above-described embodiment, the number of the lateral channel 713 of top sub 71 can be two, and is perhaps more; The lateral channel that shell body 72 circumferentially arranges also can be one, and is perhaps a plurality of.
In above-described embodiment, the number of hydraulic locking mechanism 74 also can be three, and is perhaps more.
In above-described embodiment, hydraulic locking mechanism 74, mechanical type draw bail 75, and hydraulic system all belongs to prior art, no longer describes in detail at this.
According to different operation needs, the present invention can realize following major function:
When 1) apparatus of the present invention do not make in the water pump group 5, has the ability that transforms to the conventional drilling mode.
2) pump group 5 and rotation shunting injection device 7 can be arranged on the seabed in the water of the present invention, its process that realizes double-gradient well drilling is basic identical with conventional subsea pump lifting mud realization double-gradient well drilling, the drilling fluid that the present invention can distribute from the marine riser annular space by injection/reflux pipeline 15 liftings of minor diameter is realized double-gradient well drilling (DGD); The present invention can also realize controlled mud cap drilling well (CMCD) by the liquid level of drilling fluid in the submersible pump group control marine riser; The present invention also can realize dual density drilling well (DDD) by injecting low density flow dilution marine riser drilling fluid density.Pump group in the water is arranged on the seabed scheme is subjected to the influence of the depth of water bigger, 500~1500 meters of the general work depth of waters.
3) the present invention is installed in the water in the floating drum pump group 5 and can dives and float in the water, it is generally apart from 500~1500 meters on sea, operating depth can reach 3000 meters, the drilling fluid that the present invention can distribute from the marine riser annular space by injection/reflux pipeline 15 liftings of minor diameter is realized double-gradient well drilling (DGD); The present invention can also control the liquid level of drilling fluid in the marine riser, realizes controlled mud cap drilling well (CMCD); The present invention also can realize dual density drilling well (DDD) by injecting low density flow dilution marine riser drilling fluid density.
The mounting method that apparatus of the present invention are arranged on the seabed is:
When the present invention is arranged on the seabed, different drilling phases, rotation shunting injection device 7 can connect with different seabed wellhead equipments.When boring the top layer well, rotation shunting injection device 7 is with the seabed basal disc or low pressure well is oral is connected, and when boring outer all the other borehole segments of top layer well, and rotation is shunted 7 of injection devices and is connected with subsea blow out preventer 9 upper ends.Because at different drilling phases, installation and the function of rotation shunting injection device 7 are basic identical, only are connected to the embodiment explanation with rotation shunting injection device 7 and subsea blow out preventer 9 at this, namely bore all the other outer borehole segments of top layer well.
1) marine riser 6 is gone up by the flange connection in top sub 71 tops that will rotate shunting injection device 7, the bottom of top sub 71 connects shell body 72 by flange, hydraulic locking mechanism 74 is arranged on the shell body 72, shell body 72 bottoms connect subsea blow out preventer 9 by flange, and subsea blow out preventer 9 is arranged on the subsea wellheads 10.
2) pump group 5 in the water is lowered to the seabed by hoisting mechanism 2, seabed underwater robot (ROV) connects pump group 5 in the water with the lateral channel 713 of top sub 71 by flexible line 16, with pump group in the water 5 connect inject reflux pipeline 15, the lateral channel 723 of shell body 72 or 724 is connected the entrances of pump group 5 in the water by flexible line 16.
3) beginning will be rotated assembly 73 and put into shell body 72 by drilling rod 13 during drillng operation, and utilize hydraulic locking mechanism 74 that it is locked, and proceed follow-up drillng operation.
The latent mounting method that floats in the water of apparatus of the present invention is:
1) will rotate shunting injection device 7 and be installed in the marine riser predetermined altitude, 500~1500 meters under water, top sub 71 tops of rotation shunting injection device 7 connect by flange goes up marine riser 6, the bottom of top sub 71 connects shell body 72 by flange, hydraulic locking mechanism 74 is arranged on the shell body 72, shell body 72 bottoms connect marine riser 8 down by flange, and the bottom of following marine riser 8 connects subsea blow out preventer 9, and subsea blow out preventer 9 is arranged on the subsea wellheads 10.
2) pump group 5 in the water is lowered to by hoisting mechanism 2 designs 500~1500 meters of predetermined altitudes under water, regulate float buoyancy and make in the water pump group 5 dive floating.
3) seabed underwater robot (ROV) connects pump group 5 in the water with the lateral channel 713 of top sub 71 by flexible line 16, with pump group in the water 5 connect inject reflux pipeline 15, the lateral channel 723 of shell body 72 or 724 is connected the entrances of pump group 5 in the water by flexible line 16.
4), will rotate assembly 73 and put into shell body 72 by drilling rod 13 during drillng operation in beginning, and utilize hydraulic locking mechanism 74 that it is locked, proceed follow-up drillng operation.
In the above-mentioned mounting method, when make a trip, during drillng operation such as setting of casing, hydraulic locking mechanism 74 discharges rotation assembly 73 under HYDRAULIC CONTROL SYSTEM, drilling rod 13 will rotate assembly 73 and rise to the sea drill ship.When above-mentionedly making a trip, after drillng operation such as setting of casing finishes, reusing drilling rod 13 rotation assemblies 73 are installed, continue to creep into.
The various function specific implementation methods of the present invention are as follows:
Embodiment one: double-gradient well drilling embodiment
When the present invention carried out the double-gradient well drilling operation, drilling fluid entered well by drill bit, along returning on the bore hole annulus to shell body 72 along flowing in the drilling rod 13.Rotation assembly 73 utilizes the packing unit 733 of inner barrel 731 tops and bottom to hold drilling rod 13 tightly, on the drilling fluid and the outside seawater that return be isolated in the shell body 72, be forced to enter pump group 5 water from shell body 72 circumferential lateral channel 723 or 724 lateral channels, in water under the effect of pump group 5, by injection/reflux pipeline 15 lifting of bore hole annulus drilling fluid is returned the sea to drill ship, recycling.Control centre 3 regulates the drilling liquid pressure at subsea wellheads place, makes its sea water static pressure power that equals the subsea wellheads place, realizes double-gradient well drilling.
Embodiment two: controlled mud cap drilling well embodiment
When carrying out controlled mud cap drillng operation, drilling fluid flows down along annular spaces in the drilling rod 13, enters well by drill bit, and then, drilling fluid is along returning on the bore hole annulus.High density drilling fluid from the sea by inject reflux pipeline 15 enter water pump group 5, pump group 5 drives high density drilling fluid injects rotation shunting injection device 7 by flexible line 16 lateral channel 713 in the water, meet in last marine riser 6 with the drilling fluid that returns from bore hole annulus, form the mud cap.Control system 3 is regulated and is injected mud displacement and density by the pressure sensor gaging pressure on the rotation shunting injection device 7, and then the height of control mud cap comes the control well borehole pressure, realizes the drilling well of controlled mud cap.Simultaneously, control system control submersible pump group 5 valve switch, the drilling fluid that returns from bore hole annulus are by rotation shunting injection device 7, in water the driving lower edge of pump group 5 inject reflux pipeline 15 return the sea.
Embodiment three: dual density drilling well embodiment
When carrying out the dual density drillng operation, by inject reflux pipeline 15 inject low density drilling fluid to the lateral channel 713 of rotation shunting injection device 7, drilling fluid density in the reduction in the marine riser 6, thereby realize the dual density drilling well, this moment, the packing unit 733 of inner barrel 731 tops and bottom was held drilling rod 13 tightly.When the packing unit 733 of inner barrel 731 bottoms lost efficacy, the packing unit 733 at inner barrel 731 tops still can play the sealing shunting action, improves the reliability of equipment.
The various embodiments described above only are used for explanation the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents and improvement of carrying out on the basis of technical solution of the present invention all should do not got rid of outside protection scope of the present invention.

Claims (9)

1. pump drill well system in the deep water multifunctional water, it is characterized in that: it comprises hoisting mechanism and the control centre that is arranged on the offshore boring island; Described hoisting mechanism connects a floating drum by hawser, be provided with pump group in the water of being formed by the seabed slush pump in the described floating drum, the pump group connects the control pipeline respectively in the described water, injection/reflux pipeline and some flexible lines, the other end of described control pipeline connects described control centre, the other end of described injection/reflux pipeline connects the mud pit that is arranged on the described offshore boring island, the other end of each described flexible line connects a rotation shunting injection device, the top of described rotation shunting injection device connects goes up marine riser, the described other end of going up marine riser is arranged on the offshore boring island, the bottom of described rotation shunting injection device connects subsea blow out preventer, and described subsea blow out preventer is arranged on the subsea wellheads place; The drilling rod that arranges on the described offshore boring island passes described going up at the bottom of marine riser, rotation shunting injection device and the subsea blow out preventer lower going-into-well successively, and the described drilling rod that is positioned at the shaft bottom is outside equipped with sleeve pipe, and described sleeve pipe is outside equipped with conduit;
Described rotation shunting injection device comprise one with described on the top sub that is connected of marine riser, described top sub is provided with lateral channel, described lateral channel connects pump group in the described water by a described flexible line wherein; Described top sub bottom connects a shell body, be provided with a rotation assembly in the described shell body, described shell body is provided with the hydraulic locking mechanism for the described rotation assembly of locking, described hydraulic locking mechanism connects hydraulic system, the described shell body that is positioned at described hydraulic locking mechanism below is provided with lateral channel, this described lateral channel connects pump group in the described water by a described flexible line wherein, and described shell body bottom connects described subsea blow out preventer.
2. pump drill well system in the deep water multifunctional water, it is characterized in that: it comprises hoisting mechanism and the control centre that is arranged on the offshore boring island; Described hoisting mechanism connects a floating drum by hawser, be provided with pump group in the water of being formed by the seabed slush pump in the described floating drum, the pump group connects the control pipeline respectively in the described water, injection/reflux pipeline and some flexible lines, the other end of described control pipeline connects described control centre, the other end of described injection/reflux pipeline connects the mud pit that is arranged on the described offshore boring island, the other end of each described flexible line connects a rotation shunting injection device, the top of described rotation shunting injection device connects goes up marine riser, the described other end of going up marine riser is arranged on the offshore boring island, the bottom of described rotation shunting injection device connects marine riser down, the bottom of described marine riser down connects subsea blow out preventer, and described subsea blow out preventer is arranged on the subsea wellheads place; The drilling rod that arranges on the described offshore boring island passes described going up at the bottom of marine riser, rotation shunting injection device, following marine riser and the subsea blow out preventer lower going-into-well successively, and the described drilling rod that is positioned at the shaft bottom is outside equipped with sleeve pipe, and described sleeve pipe is outside equipped with conduit;
Described rotation shunting injection device comprise one with described on the top sub that is connected of marine riser, described top sub is provided with lateral channel, described lateral channel connects pump group in the described water by a described flexible line wherein; Described top sub bottom connects a shell body, be provided with a rotation assembly in the described shell body, described shell body is provided with the hydraulic locking mechanism for the described rotation assembly of locking, described hydraulic locking mechanism connects hydraulic system, the described shell body that is positioned at described hydraulic locking mechanism below is provided with lateral channel, this described lateral channel connects pump group in the described water by a described flexible line wherein, and described shell body bottom connects described marine riser down.
3. pump drill well system in a kind of deep water multifunctional water as claimed in claim 1 or 2, it is characterized in that: described rotation assembly is symmetrical structure, it comprises an inner barrel, and the top of described inner barrel is connected a packing unit by a glue core syndeton respectively with the bottom; Described inner barrel is arranged in the outer cylinder body by the swivel bearing system, and described outer cylinder body outer wall is symmetrically arranged with the locking slot corresponding with two described hydraulic locking mechanisms, is provided with static seal structure between described outer cylinder body and the described shell body.
4. pump drill well system in a kind of deep water multifunctional water as claimed in claim 3 is characterized in that: described swivel bearing system comprises bearing, bearing chamber and bearing seal system, and described bearing chamber connects the lubricating fluid injection device.
5. pump drill well system in a kind of deep water multifunctional water as claimed in claim 1, it is characterized in that: the described top sub of described rotation shunting injection device is connected by flange with the described marine riser of going up, described top sub bottom is connected by flange with described shell body, and described shell body bottom is connected by flange with described subsea blow out preventer.
6. pump drill well system in a kind of deep water multifunctional water as claimed in claim 2, it is characterized in that: the described top sub of described rotation shunting injection device is connected by flange with the described marine riser of going up, described top sub bottom is connected by flange with described shell body, and described shell body bottom is crossed flange with described marine riser down and is connected.
7. as pump drill well system in claim 1 or 2 or the 5 or 6 described a kind of deep water multifunctional waters, it is characterized in that: the lateral channel that arranges on the described top sub, the hydraulic locking mechanism that arranges on the described shell body and lateral channel are two.
8. mounting method of pump drill well system in the deep water multifunctional water according to claim 1, it may further comprise the steps:
1) marine riser is gone up by the flange connection in the top sub top that will rotate the shunting injection device, the bottom of top sub connects shell body by flange, hydraulic locking mechanism is arranged on the shell body, and the shell body bottom connects subsea blow out preventer by flange, and subsea blow out preventer is arranged on the subsea wellheads;
2) pump group in the water is lowered to the seabed by hoisting mechanism, the seabed underwater robot connects pump group in the water with the lateral channel of top sub by flexible line, with pump group in the water connect to inject reflux pipeline, the lateral channel of shell body is connected the entrance of pump group in the water by flexible line;
3) will rotate assembly and put into shell body by drilling rod, and utilize hydraulic locking mechanism that it is locked.
9. mounting method as pump drill well system in the deep water multifunctional water as described in the claim 2, it may further comprise the steps:
1) marine riser is gone up by the flange connection in the top sub top that will rotate the shunting injection device, the bottom of top sub connects shell body by flange, hydraulic locking mechanism is arranged on the shell body, the shell body bottom connects marine riser down by flange, the bottom of following marine riser connects subsea blow out preventer, and subsea blow out preventer is arranged on the subsea wellheads;
2) pump group in the water is lowered under water by hoisting mechanism, the predetermined altitude identical with rotation shunting injection device, and the adjusting float buoyancy makes, and the pump group is latent in the water floats;
3) the seabed underwater robot connects pump group in the water with the lateral channel of top sub by flexible line, with pump group in the water connect inject reflux pipeline, the lateral channel of shell body is connected the entrance of pump group in the water by flexible line;
4) will rotate assembly and put into shell body by drilling rod, and utilize hydraulic locking mechanism that it is locked.
CN 201110052483 2011-03-04 2011-03-04 Deepwater multifunctional water pump drilling system and installation method thereof Active CN102155163B (en)

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CN104895548B (en) * 2015-06-15 2017-11-03 中国石油大学(华东) Deepwater dual gradient drilling is indicated and self-checking device with subsea wellheads pressure
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CN106285554B (en) * 2016-09-07 2018-09-14 中国石油大学(华东) Wellbore pressure control system and method for the stage of cementing the well

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